package com.hu.example.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;

import com.hu.example.Constants;

public class PageEncodingFilter implements Filter {
    protected FilterConfig filterConfig;
    private String encoding = "";

    @Override
    public void destroy() {

    }

    @Override
    public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) arg0;
        request.setCharacterEncoding(encoding);
        filterChain.doFilter(request, arg1);
    }

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        this.filterConfig = filterConfig;
        encoding = null == filterConfig.getInitParameter(Constants.ENCODING) ? Constants.DEFAULT_ENCODING : filterConfig.getInitParameter(Constants.ENCODING);
    }
}
